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Description
The UKPD25 is a dedicated DC isolator switch designed primarily for photovoltaic (PV) systems. It enables safe disconnection of the DC side of a solar string or PV-array, allowing for maintenance or emergency shut-off. According to the manufacturer’s product page, key features include:
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A UV-resistant plastic housing, suitable for outdoor exposure. kripal.com+2Zhejiang KRIPAL Electric Co., Ltd.+2
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A rated current of 32 A. kripal.com+2Zhejiang KRIPAL Electric Co., Ltd.+2
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An insulation voltage of 1500 V (i.e., the housing is specified to insulate up to this voltage) in the manufacturer’s description. kripal.com
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Protection rating: IP66 (dust-tight and powerful water jets) or sometimes listed with IP66/IP67. Zhejiang KRIPAL Electric Co., Ltd.
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Use category: “DC-21B”, meaning it is designed for DC load-breaking under the IEC/EN standard for isolators. kripal.com+1
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The product is described as a “true DC switching isolator” not simply an AC isolator re-rated for DC. Zhejiang KRIPAL Electric Co., Ltd.
🛠 Application & Construction Details
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Intended for use in PV installations: e.g., on the DC side of inverters, between the PV string and inverter, or in a combiner box. Shenzhen City Breaker Co., Ltd.+1
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The enclosure has knock-outs for M20/M25 cable glands for ingress/egress of PV cables. Shenzhen City Breaker Co., Ltd.+1
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The handle is typically padlockable, to allow lock-out for safety during maintenance. Zhejiang KRIPAL Electric Co., Ltd.
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The housing is designed for outdoor installation (UV resistant) and is suitable for vertical/horizontal mounting (as indicated in one spec sheet). Shenzhen City Breaker Co., Ltd.
✅ Typical Key Attributes
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Rated Current: 32 A
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Insulation Voltage: Up to 1500 V (housing)
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Protection Class: IP66 (sometimes IP66/IP67)
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Application Category: DC-21B (for DC load isolation)
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Material: UV-resistant plastic enclosure
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Mounting: Outdoor / surface installation; suitable for PV systems
✅ Core Specifications
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Rated current: 25 A. kripal.com+1
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Insulation voltage: 1500 V DC (for the UKPD25 listing on KRIPAL’s site). kripal.com
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Use category: DC-21B (suitable for load-breaking DC applications). kripal.com+1
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Protection/Enclosure rating: IP66 (dust tight, protection against powerful water jets) in the official listing. kripal.com+1
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Shell/casing: UV-resistant plastic housing (suitable for outdoor PV string installations).
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Standard compliance: Conforms to EN 60947‑3 (switching devices). kripal.com+1
⚠️ Additional Important Details & Typical Values
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Some listings for UKPD25 mention a rated voltage of 1000 V DC for similar models (e.g., UKPD25-X) under “Solar PV 1000 V DC Waterproof Rotary Isolator Switch” descriptions. Zhejiang KRIPAL Electric Co., Ltd.+1
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Enclosure and mounting: Wall-mounted, PC/polycarbonate enclosure, M20/M25 knockouts for cable access. Zhejiang KRIPAL Electric Co., Ltd.+1
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Mechanical life: Around 20,000 operations reported in some spec listings. Zhejiang KRIPAL Electric Co., Ltd.
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Switching capability: Designed to break DC loads (important because DC arcs must be extinguished differently than AC). Zhejiang KRIPAL Electric Co., Ltd.
📝 Summary
In practical terms:
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This device is designed for solar PV DC circuits, where you need a reliable isolator on the DC side (string inverter/combiner box).
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It supports around 25 A current, up to high DC voltage (1500 V in the spec sheet) which makes it suitable for many PV string systems.
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With IP66 rating it’s suitable for outdoor installation, exposed conditions (but still check local environment and mounting).
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Ensure the specific model you have (UKPD25) has the exact rated voltage that matches your system (e.g., 1000 V vs 1500 V).
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